Mechanochemical pre-treatment of lateritic nickel ore with sulfur followed by atmospheric leaching

Basturkcu, Huseyin; Achimovičová, Marcela; Kaňuchová, Mária; Acarkan, Neşet

doi:10.1016/j.hydromet.2018.08.016

Cited by 15 publications

(10 citation statements)

References 20 publications

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“…In this regard, general trends indicate an extremely high (up to 85 % of the total yield of useful components) importance of the first hour of mecha nochemical activation in the implementation of agitation leaching. In another similar study [7], the effect of the mecha nism of mechanochemical processing of lateritic nickel ore in vibrating ball mill (ESM, Germany) on the recovery of Ni, Fe and Co was studied. The laterite samples were processed in a mill for 1 h with the addition of S -20 %, the rotor speed was 960 min -1 , at a concentration of H 2 SO 4 = 200, 250, 300, 400 g/l and a S/L ratio of 1/2.5.…”

Section: Fig 2 Distribution Of Zinc Yield Depending On the Concentration Of Sulfuric And Hydrochloric Acidsmentioning

confidence: 99%

“…For example, twohour treatment (or 1 hour with the si multaneous addition of sulfur) of laterite nickel ore containing Fe and Mg results in the formation of FeMgS with the release of Ni and Co [7]. These facts indicate that, in addition to ac celerating the kinetics of leaching, the mechanochemical ef fect on mineral raw materials is accompanied by phase trans formations of its constituent elements.…”

mentioning

confidence: 99%

“…From the analysis of Fig. 10 of [7], it follows that after activation of the ore and subsequent atmospheric leach ing (with a concentration of H 2 SO 4 = 300 g/l and a S/L ratio of 1 2.5) for 1 h, the Ni yield was 62 % . With an increase in the duration of the process to 4 h (4 times), the proportion of Ni increases up to 77 %.…”

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confidence: 99%

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Impact of duration of mechanochemical activation on enhancement of zinc leaching from polymetallic ore tailings

Голик¹,

Dmitrak²,

Brigida³

2020

Nauk. visn. nat. hirn. univ.

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Purpose. Determination the impact of duration of mechanochemical activation on enhancement of zinc leaching from poly metallic ore tailings to ensure the sustainable mining.Methodology. In experimental studies on the mechanical activation of geomaterial from the tails of Sadon polymetallic ores, the DESI11 disintegrator was used. As a solution for leaching, a mixture with a different ratio of mass concentrations of hydro chloric and sulfuric acids was used. In addition, the ratio of solid and liquid fractions was varied from 1/4 to 1/10 with process duration of 15 to 60 minutes. The results were processed by the standard LOESS method in combination with threedimensional interpolation of an incomplete data sample.findings. Polynomial dependences have been established that make it possible to calculate the degree of zinc extraction from the tail, depending on the parameters of the process of the leached solution, the ratio of the solid and liquid phases in the pulp and the duration of agitation leaching. originality. For the first time, the mechanism of surface transformation, size and location of zones with maximum leaching efficiency with small changes in the duration of mechanical activation of the pulp was clarified.Practical value. The revealed patterns can be used to optimize the parameters of agitation leaching by correlating the cost of energy consumption for increasing the duration of the process and unit costs for the lixiviants.

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Section: Fig 2 Distribution Of Zinc Yield Depending On the Concentration Of Sulfuric And Hydrochloric Acidsmentioning

confidence: 99%

mentioning

confidence: 99%

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Impact of duration of mechanochemical activation on enhancement of zinc leaching from polymetallic ore tailings

Голик¹,

Dmitrak²,

Brigida³

2020

Nauk. visn. nat. hirn. univ.

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“…Indonesia, khususnya provinsi Sulawesi merupakan salah satu negara yang memiliki cadangan bijih laterit terbesar di dunia [1]. Kandungan nikel yang berasal dari bijih laterit merupakan salah satu bahan baku dalam industri pembuatan baja [2]. Baja memiliki peranan yang sangat penting sebagai bahan baku untuk pembangunan dalam berbagai bidang.…”

Section: Pendahuluanunclassified

“…Penelitian ini menggunakan baja laterit paduan Cr-Mo yang diproses melalui pengecoran. Parameter yang divariasikan dalam penelitian ini adalah perlakuan panas karburisasi austemper menggunakan serbuk arang halus dan pendinginan dengan: (1) semburan udara selama 1 jam, (2) [13].…”

Section: Pendahuluanunclassified

Pengaruh Perlakuan Panas Karburisasi Austemper pada Baja Laterit Paduan Cr-Mo terhadap Sifat Mekanik dan Struktur Mikro

Herbirowo

Puspasari

Primatama

et al. 2020

JTBBT

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This research was aimed to do heat treatment of austemper carburization and investigate the effect of various cooling media on mechanical properties and microstructure of Cr-Mo alloy lateritic steel. Heat treatment was conducted to austenisation temperature at 950o C for 1 hour and austemper carburization at 400o C for 1 hour. Variation of cooling media included air blowing for 1 hour, water, and furnace cooling for 24 hours. Hardness and impact test were done using Hardness Rockwell and Charpy methods. Microstructure was observed using optical microscope. Fracture surface characterization was using SEM-EDX. The results showed the highest hardness of 65.48 HRC in sample that cooled by air blowing for 1 hour. The microstructure of this sample showed phases of ferrite, pearlite and martensite which causing higher hardness. The highest impact strength of 20 Joule took place in the furnace cooled sample. Characterization of the fracture surface using SEM-EDX showed dimple of ductile fractures.Penelitian ini bertujuan untuk melakukan proses perlakukan panas karburisasi austemper dan mempelajari pengaruh media pendinginan terhadap sifat mekanik dan struktur mikro baja laterit paduan Cr-Mo. Perlakuan panas yang dilakukan yaitu pemanasan sampel pada temperatur austenisasi (950o C) selama 1 jam dan proses karburisasi austemper dengan media serbuk arang halus pada temperatur 400o C selama 1 jam. Variasi pendinginan yang digunakan yaitu air blowing (semburan udara) selama 1 jam, air dan tungku selama 24 jam. Pengujian kekerasan dilakukan dengan metode Rockwell Hardness dan pengujian impak dilakukan dengan metode charpy. Karakterisasi struktur mikro dilakukan dengan proses metalografi dan mikroskop optik. Karakterisasi permukaan patahan pengujian impak dilakukan dengan SEM-EDX. Hasil penelitian ini menunjukkan nilai kekerasan tertinggi yaitu 65,48 HRC terjadi pada sampel dengan air blowing selama 1 jam. Struktur mikro sampel tersebut menunjukkan adanya fasa ferit, perlit dan martensit yang membuat sampel menjadi keras. Nilai kekuatan impak tertinggi sebesar 20 Joule terjadi pada sampel dengan pendinginan di dalam tungku selama 24 jam. Karakterisasi permukaan patahannya menggunakan SEM-EDX menunjukkan adanya dimple dari patah ulet.

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Efficiency Gains When Using Activated Mill Tailings in Underground Mining

Brigida,

Golik,

Klyuev

et al. 2023

Metallurgist

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Mechanochemical pre-treatment of lateritic nickel ore with sulfur followed by atmospheric leaching

Cited by 15 publications

References 20 publications

Impact of duration of mechanochemical activation on enhancement of zinc leaching from polymetallic ore tailings

Impact of duration of mechanochemical activation on enhancement of zinc leaching from polymetallic ore tailings

Pengaruh Perlakuan Panas Karburisasi Austemper pada Baja Laterit Paduan Cr-Mo terhadap Sifat Mekanik dan Struktur Mikro

Efficiency Gains When Using Activated Mill Tailings in Underground Mining

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